Issue #3331663: If the update:lightning command can't find composer.json, the exception should mention the --composer-file option

src/Commands/LightningCoreCommands.php

@@ -153,10 +153,10 @@ class LightningCoreCommands extends DrushCommands {
    *   Lightning components' dependenices to the project's `composer.json`.
    *
    * @option upgrade Move Lightning components' dependencies to the project's composer.json.
-   * @option composer-file The absolute path to the project's composer.json.
+   * @option file The absolute path to the project's composer.json.
    * @option commands-only Display the Composer commands to run, instead of modifying composer.json.
    */
-  public function update(array $options = ['upgrade' => FALSE, 'composer-file' => NULL, 'commands-only' => FALSE]) {
+  public function update(array $options = ['upgrade' => FALSE, 'file' => NULL, 'commands-only' => FALSE]) {
     $io = $this->io();
     $io->warning("This command is removed from Lightning Core 6. See https://www.drupal.org/node/3303698 for more information.");
 
@@ -170,19 +170,19 @@ class LightningCoreCommands extends DrushCommands {
       throw new \RuntimeException("Database updates have not yet been run. Please run them and try again.");
     }
 
-    if ($options['composer-file']) {
-      $file = $options['composer-file'];
+    if ($options['file']) {
+      $file = $options['file'];
     }
     else {
       $file = Drush::bootstrapManager()->getComposerRoot() . DIRECTORY_SEPARATOR . 'composer.json';
     }
     if (!file_exists($file)) {
-      throw new \RuntimeException("The composer.json file for the project ($file) does not appear to exist.");
+      throw new \RuntimeException("The composer.json file for the project ($file) was not found. Please specify its absolute path with the --file option.");
     }
 
     // Fall back to read-only mode if composer.json isn't writable.
     if (empty($options['commands-only'])) {
-      $io->writeln("Moving Lightning components' dependencies to $file...");
+      $io->block("Moving Lightning components' dependencies to $file...");
 
       if (!is_writable($file)) {
         $options['commands-only'] = TRUE;